I just got the news about the OpenGL 4.3 spec, which was released today, and is available at http://www.opengl.org/registry/. The spec document has been reorganized and cleared up considerably and is a lot easier to follow than the previous specifications. New features include (ordered by importance for my projects):

• Queries for internal texture format parameters
• Debug output callbacks
• Compute shaders
• Texture views
• and others

I’m currently on a project where compatibility and scaleability is prime, so the first two features are very welcome as development aids to make the code run robustly on a variety of platforms. Compute shaders and texture views are of course cool, but require the newest hardware, so they are lower in my list.

A nice touch by Nvidia to make to expose the new functionality as extensions on older hardware.